Design And Implementation Of Leakage Protection Special Integrated Circuit Test System

As the scale of China’s economic construction continues to expand, consumptionalso grow with each passing day, the electricity safety issues have also becomeincreasingly prominent and severe, electric fire and electric shock accidents haveoccurred from time to time. Although you can take a variety of measures to reduceelectrical accidents, but the practice proof, the leakage protection technology is the mostdirect and effective method, so it has been widely applied. With the development ofindustry and the electronics, semiconductor technology, pulsating DC components oftencontain the leakage current, due to the wide application of our country AC leakageprotector can not ensure reliable tripping, therefore, false action and non action of faultsoccur, this will require the development of more powerful A leakage protector. Theperformance of the protective security protection for electric fire prevention and electricshock plays an important role in. With the increase of the reliability of leakageprotection requirements, put forward higher requirement for leakage protection leakageaction characteristic parameters for test.The main contents of this thesis A leakage protection IC test technology research,explores the theoretical study and practical protection against leakage detectiontechnology, design the hardware system and software system testing system for theprotection of A type LW301A type leakage leakage protection of integrated circuitbased on integrated circuits, rapid detection, processing and display can be realizedleakage current. Automatic test system based on ATMEGA8515and80C51chip designof leakage protection action characteristics, can automatically test the leakage protectiondevice parameters, and provides an effective means for the performance of theprotective research, quality inspection and production.The innovation of this thesis use SCM control circuit, high precision ADCconversion and high precision operational amplifier integrated circuit to generate highaccuracy of leakage signal can automatically adjust and control, this method effectivelysolves the defects of traditional use many original mutual inductance coil producesleakage signal, greatly improving the accuracy and reliability of test system, effectivelysolve the production the problems existing in test. At present, this test system has been basically completed the system hardware circuit design, software control programdevelopment and debugging work, initially completed the task of the system design.The test system has been applied to product testing and inspection, can be more accurateand complete test the IC function and performance parameters, and the design target isreached.